// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef BASE_TEST_SIMPLE_TEST_TICK_CLOCK_H_
#define BASE_TEST_SIMPLE_TEST_TICK_CLOCK_H_

#include "base/compiler_specific.h"
#include "base/synchronization/lock.h"
#include "base/time/tick_clock.h"
#include "base/time/time.h"

namespace base {

// SimpleTestTickClock is a TickClock implementation that gives
// control over the returned TimeTicks objects.  All methods may be
// called from any thread.
class SimpleTestTickClock : public TickClock {
public:
    // Starts off with a clock set to TimeTicks().
    SimpleTestTickClock();
    ~SimpleTestTickClock() override;

    TimeTicks NowTicks() override;

    // Advances the clock by |delta|, which must not be negative.
    void Advance(TimeDelta delta);

    // Sets the clock to the given time.
    void SetNowTicks(TimeTicks ticks);

private:
    // Protects |now_ticks_|.
    Lock lock_;

    TimeTicks now_ticks_;
};

} // namespace base

#endif // BASE_TEST_SIMPLE_TEST_TICK_CLOCK_H_
